a-research-team-wants-to-estimate-the-standard-deviation-of-time-spent-on-social

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A research team wants to estimate the standard deviation of time spent on social media by teenagers. Find the minimum sample size needed to be $99 percent sign$ confident that the sample standard deviation $s$ is within $3 percent sign$ of the population standard deviation $σ$ .

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A research team wants to estimate the standard deviation of time spent on social media by teenagers. Find the minimum sample size needed to be 99%99\% confident that the sample standard deviation ss is within 3%3\% of the population standard deviation σσ.

A research team wants to estimate the standard deviation of time spent on social media by teenagers. Find the minimum sample size needed to be $99 percent sign$ confident that the sample standard deviation $s$ is within $3 percent sign$ of the population standard deviation $σ$ .